Thermal head



FIG. 1 is a front view of the thermal head of my design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right end view thereof, the left end view being a mirror image thereof;

FIG. 6 is an enlarged front view of the portion designated in FIG. 1;

FIG. 7 is an enlarged perspective view of the portion shown in FIG. 6;

FIG. 8 is an enlarged cross-sectional view taken along line 8-8 on FIG. 6; and,

FIG. 9 is an enlarged cross-sectional view of the portion designated in FIG. 8.

The broken lines of even length depict environment and form no part of the claimed design. The broken lines of uneven length define the boundary of the claimed design. 

CLAIM The ornamental design for a thermal head, as shown and described. 